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- /****************************************************************************
- * sched/task/spawn.h
- *
- * Copyright (C) 2013 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
- #ifndef __SCHED_TASK_SPAWN_H
- #define __SCHED_TASK_SPAWN_H
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <spawn.h>
- /****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
- #ifndef CONFIG_POSIX_SPAWN_PROXY_STACKSIZE
- # define CONFIG_POSIX_SPAWN_PROXY_STACKSIZE 1024
- #endif
- /****************************************************************************
- * Public Type Definitions
- ****************************************************************************/
- struct spawn_parms_s
- {
- /* Common parameters */
- int result;
- FAR pid_t *pid;
- FAR const posix_spawn_file_actions_t *file_actions;
- FAR const posix_spawnattr_t *attr;
- FAR char * const *argv;
- /* Parameters that differ for posix_spawn[p] and task_spawn */
- union
- {
- struct
- {
- FAR const char *path;
- } posix;
- struct
- {
- FAR const char *name;
- main_t entry;
- } task;
- } u;
- };
- /****************************************************************************
- * Public Data
- ****************************************************************************/
- extern sem_t g_spawn_parmsem;
- #ifndef CONFIG_SCHED_WAITPID
- extern sem_t g_spawn_execsem;
- #endif
- extern struct spawn_parms_s g_spawn_parms;
- /****************************************************************************
- * Public Function Prototypes
- ****************************************************************************/
- /****************************************************************************
- * Name: spawn_semtake and spawn_semgive
- *
- * Description:
- * Give and take semaphores
- *
- * Input Parameters:
- *
- * sem - The semaphore to act on.
- *
- * Returned Value:
- * None
- *
- ****************************************************************************/
- void spawn_semtake(FAR sem_t *sem);
- #define spawn_semgive(sem) nxsem_post(sem)
- /****************************************************************************
- * Name: spawn_execattrs
- *
- * Description:
- * Set attributes of the new child task after it has been spawned.
- *
- * Input Parameters:
- *
- * pid - The pid of the new task.
- * attr - The attributes to use
- *
- * Returned Value:
- * Errors are not reported by this function. This is because errors
- * cannot occur, but ratther that the new task has already been started
- * so there is no graceful way to handle errors detected in this context
- * (unless we delete the new task and recover).
- *
- * Assumptions:
- * That task has been started but has not yet executed because pre-
- * emption is disabled.
- *
- ****************************************************************************/
- int spawn_execattrs(pid_t pid, FAR const posix_spawnattr_t *attr);
- /****************************************************************************
- * Name: spawn_proxyattrs
- *
- * Description:
- * Set attributes of the proxy task before it has started the new child
- * task.
- *
- * Input Parameters:
- *
- * pid - The pid of the new task.
- * attr - The attributes to use
- * file_actions - The attributes to use
- *
- * Returned Value:
- * 0 (OK) on successed; A negated errno value is returned on failure.
- *
- ****************************************************************************/
- int spawn_proxyattrs(FAR const posix_spawnattr_t *attr,
- FAR const posix_spawn_file_actions_t *file_actions);
- #endif /* __SCHED_TASK_SPAWN_H */
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